In the laboratory, two forms of sodium phosphat nah. po.-h. o, f. w. = 137.99 g/mol, and the dibas most efficient way of making this phosphate buffe which compound you will use. erms of sodium phosphate will be available (the monobasic monohydrate = 137.99 g/mol, and the dibasic na hpo4, f. w. = 141.96 g/mol). explain the of making this phosphate bulter by using only one of the compounds, and specify
and explain how the 0.3% al2(so4)3 (w/v) solution will be prepared. 2. provide calculations and explain how the 0.3% al(so4), (w/y

aquifers are bounded above and below by impermeable rock. the driving force of groundwater movement in confined aquifers is pressure, rather than gravity.

a. the law of proportion states the combination of 2 atoms in a specific ratio to produce multiple compounds such as the given statement of question ‘1st compound contains 88.8 % cu ’ indicates 88.8 g of cu is present along with 11.2 g oxygen in 100 g of compound whereas the statement ‘2st compound contains 79.9 % cu ’ indicates 79.9 g of cu is present along with 20.1 g oxygen in 100 g of compound

1st compound contains 88.8 g cu

for cu

m = 63 g /mol

atomic % = 88.8 /63 = 1.42

for o

m = 16 g /mol

atomic % = 11.2 /16 = 0.7

b. the emperical formula of 1st compound is

cu1.4o0.7

cu2o

answerambulatory;